It's hard for women to resist Richard “Rick” Castle. He's pretty much a rock star of the literary world. He has also been divorced twice and now shares an apartment with his daughter and mother.

He also an well-known mystery novelist who was suffering from writer's block after killing off the main character in his book series. However, he soon finds out that there has been a copy-cat murder based on his book. He starts shadowing Detective Kate Beckett and uses everything he knows from mysteries to help solve murders.